Modelling the response of fresh groundwater to climate and vegetation changes in coral islands
Modelling the response of fresh groundwater to climate and vegetation changes in coral islands
复制标题
模拟珊瑚岛地下水对气候和植被变化的响应
DOI:
10.1007/s10040-014-1160-y
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发表时间:
2014
影响因子:
2.8
通讯作者:
Comte J
中科院分区:
文献类型:
--
作者:
Comte J
In coral islands, groundwater is a crucial freshwater resource for terrestrial life, including human water supply. Response of the freshwater lens to expected climate changes and subsequent vegetation alterations is quantified for Grande Glorieuse, a lowlying coral island in the Western Indian Ocean. Distributed models of recharge, evapotranspiration and saltwater phytotoxicity are integrated into a variabledensity groundwater model to simulate the evolution of groundwater salinity. Model results are assessed against field observations including groundwater and geophysical measurements. Simulations show the major control currently exerted by the vegetation with regards to the lens morphology and the high sensitivity of the lens to climate alterations, impacting both quantity and salinity. Long-term changes in mean sea level and climatic conditions (rainfall and evapotranspiration) are predicted to be responsible for an average increase in salinity approaching 140%(+ 8 kg m− 3) when combined. In low-lying areas with high vegetation density, these changes top+ 300%(+ 10 kg m− 3). However, due to salinity increase and its phytotoxicity, it is shown that a corollary drop in vegetation activity can buffer the alteration of fresh groundwater. This illustrates the importance of accounting for vegetation dynamics to study groundwater in coral islands.
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DOI:
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发表时间:
2010
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影响因子:
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作者:
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通讯作者:
A. Aris
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2006
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2000
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DOI:
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1990
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作者:
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通讯作者:
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